Question

I have just ordered a tea infuser - you scoop up loose leaves, put the cap on and let the thing sit in a cup of boiling water until your tea's made - that sort of tea infuser.
Here 'tis in picture form
 
One of its key features is that it's  
Durable enough for industrial use

Now this is what I don't get - to what sort of INDUSTRIAL USE can you put a one teaspoon size tea infuser?

Anyone?  Anyone?**
**Thanks Susan - of course!  Restaurant use!!!